You may as well run them through a shredder. All modern tapes have embedded servo tracks.
On 4/30/17 7:38 AM, Mike Loewen via cctalk wrote:
Looking for recommendations for a bulk tape eraser for SDLT and DLT IV tapes.
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology
http://q7.neurotica.com/Oldtech/